Copy unsigned char array

Question

What would be the best way to copy unsigned char array to another?

For example:

unsigned char q[1000];
unsigned char p[1000];

strcpy (q,&p);

The above code does not work, it gives me error saying "cannot convert parameter 1 from unsigned char [1000] to char *".

Are you sure you didn't mean to tag this question c++ and not c? There should be no problem using strcpy with unsigned char arrays (as long as they're null-terminated) in C. At worst an off-by-default warning. — R.. GitHub STOP HELPING ICE
– R.. GitHub STOP HELPING ICE, Commented Dec 22, 2010 at 8:03
It does not matter if it is C or C++, using the &operator is always a bug here. — kuszi
– kuszi, Commented Dec 22, 2010 at 8:37

icecrime · Accepted Answer · 2013-04-23 11:51:08Z

27

As indicated by its name, strcpy works on C string (which a unsigned char array is not).

You should consider memcpy.

edited Apr 23, 2013 at 11:51

user283145

answered Dec 22, 2010 at 7:59

icecrime

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2 Comments

user2591612 Over a year ago

You can cast an unsigned char* to char*.

mLstudent33 Over a year ago

Can you provide a small example as I am having problems with copying an unsigned char variable to an unsigned char array using memcpy. passing argument 2 of ‘memcpy’ makes pointer from integer without a cast [-Wint-conversion]

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